Søren Kierkegaard’s influence on the thought of Mikhail Bakhtin has received relatively little attention from Bakhtin scholars (and hardly any attention from Bakhtin scholars in the English-speaking world). Yet, as I argue in this paper, Kierkegaard was among the most important formative influences on Bakhtin's work. This influence is most evident in Bakhtin's early ethical philosophy, but remains highly relevant in later periods. Reading Bakhtin as a follower and developer of Kierkegaard's fundamental philosophical insights provides us with a key to the unity of Bakhtin's thought.